1. Department of Statistics, Government S.E College, Bahawalpur, Pakistan
2. Department of Mathematics and Statistics, American University of Sharjah, Sharjah, UAE
3. Departamento de Estatística, Universidade Federal de Pernambuco, Recife, Brazil
4. Department of Statistics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
5. Department of Statistics, Govt Degree College, Liaqatpur, Pakistan